Re: [PATCH] mm/pagewalk: fix race between concurrent split and refault

[David Hildenbrand (Arm)]

>> +
>>       pmd = pmd_offset(pud, addr);
>>       do {
>>   again:
>> @@ -218,12 +231,13 @@ static int walk_pud_range(p4d_t *p4d, unsigned
>> long addr, unsigned long end,
>>           else if (pud_leaf(*pud) || !pud_present(*pud))
>>               continue; /* Nothing to do. */
> 
> Why not check pudval directly here? Like the following:
> 

As the patch description states: "This mirrors the
retry logic in walk_pmd_range()."

-- 
Cheers,

David